Showing papers by "Daniel Maspoch published in 2014"
TL;DR: These results showcase an attractive methodology to selectively extract C60 from fullerene mixtures, providing a platform to design tuned cages for selective extraction of higher fullerenes.
Abstract: Since fullerenes are available in macroscopic quantities from fullerene soot, large efforts have been geared toward designing efficient strategies to obtain highly pure fullerenes, which can be subsequently applied in multiple research fields. Here we present a supramolecular nanocage synthesized by metal-directed self-assembly, which encapsulates fullerenes of different sizes. Direct experimental evidence is provided for the 1:1 encapsulation of C60, C70, C76, C78 and C84, and solid state structures for the host-guest adducts with C60 and C70 have been obtained using X-ray synchrotron radiation. Furthermore, we design a washing-based strategy to exclusively extract pure C60 from a solid sample of cage charged with a mixture of fullerenes. These results showcase an attractive methodology to selectively extract C60 from fullerene mixtures, providing a platform to design tuned cages for selective extraction of higher fullerenes. The solid-phase fullerene encapsulation and liberation represent a twist in host-guest chemistry for molecular nanocage structures.
143 citations
TL;DR: In this paper, two new three-dimensional porous Zn(II)-based metal-organic frameworks, containing azine-functionalized pores, have been readily and quickly isolated via mechanosynthesis, by using a nonlinear dicarboxylate and linear N-donor ligands.
Abstract: Two new three-dimensional porous Zn(II)-based metal–organic frameworks, containing azine-functionalized pores, have been readily and quickly isolated via mechanosynthesis, by using a nonlinear dicarboxylate and linear N-donor ligands. The use of nonfunctionalized and methyl-functionalized N-donor ligands has led to the formation of frameworks with different topologies and metal–ligand connectivities and therefore different pore sizes and accessible volumes. Despite this, both metal–organic frameworks (MOFs) possess comparable BET surface areas and CO2 uptakes at 273 and 298 K at 1 bar. The network with narrow and interconnected pores in three dimensions shows greater affinity for CO2 compared to the network with one-dimensional and relatively large pores—attributable to the more effective interactions with the azine groups.
139 citations
TL;DR: This Concept article aims to showcase recently developed synthetic strategies to control the one-, two- and three-dimensional (1, 2- and 3D) organisation of MOF crystals.
Abstract: Metal–organic frameworks (MOFs) are among the most attractive porous materials known today, exhibiting very high surface areas, tuneable pore sizes and shapes, adjustable surface functionality, and flexible structures. Advances in the formation of MOF crystals, and in their subsequent assembly into more complex and/or composite superstructures, should expand the scope of these materials in many applications (e.g., drug delivery, chemical sensors, selective reactors and removal devices, etc.) and facilitate their integration onto surfaces and into devices. This Concept article aims to showcase recently developed synthetic strategies to control the one-, two- and three-dimensional (1-, 2- and 3D) organisation of MOF crystals.
58 citations
TL;DR: It is indicated that stimulation of the innate immune system with co-encapsulated immunostimulants in nano-liposomes is a promising strategy to simultaneously improve the levels of protection against bacterial and viral infections in fish.
42 citations
TL;DR: Three distinct polyamino acid-based metal-organic frameworks (MOFs) with different chiralities and porosities are prepared using the same chemistry, by simply modifying the enantiomeric ratio of the chiral organic ligand used.
29 citations
TL;DR: This localized self-supported growth of functional matter from an amino acid-based CP shows how sequential localized chemistry in a fluid cell can be used to integrate molecular systems onto device platforms using a chip incorporating microengineered pneumatic tools.
Abstract: A spatially controlled synthesis of nanowire bundles of the functional crystalline coordination polymer (CP) Ag(I)TCNQ (tetracyanoquinodimethane) from previously fabricated and trapped monovalent silver CP (Ag(I)Cys (cysteine)) using a room-temperature microfluidic-assisted templated growth method is demonstrated. The incorporation of microengineered pneumatic clamps in a two-layer polydimethylsiloxane-based (PDMS) microfluidic platform was used. Apart from guiding the formation of the Ag(I)Cys coordination polymer, this microfluidic approach enables a local trapping of the in situ synthesized structures with a simple pneumatic clamp actuation. This method not only enables continuous and multiple chemical events to be conducted upon the trapped structures, but the excellent fluid handling ensures a precise chemical activation of the amino acid-supported framework in a position controlled by interface and clamp location that leads to a site-specific growth of Ag(I)TCNQ nanowire bundles. The synthesis is co...
23 citations
11 Dec 2014
TL;DR: In this paper, the authors summarize recent advances in nano-MOF synthesis and describe how their small size can optimize their potential in gas storage and separation, drug delivery, medical imaging, catalysis, magnetism, and sensors, offering a panoramic view of this embryonic class of nanomaterials.
Abstract: The empty volume within porous materials provides virtually unlimited space for imagination, allowing the use of their internal surface with different functionalities for a myriad of applications. This is particularly the case for porous metal-organic frameworks (MOFs), which are highly crystalline inorganic–organic networks constructed by assembling metal ions or metal-containing clusters with multifunctional organic ligands. MOFs are attracting considerable attention due to their various structural architectures, which exhibit extremely high surface areas and feature tunable pore size. The functionalization of their internal surface is the key aspect for their intriguing properties in gas storage and separation, catalysis, drug delivery, sensing, and magnetism. To date, most of the MOFs reported for specific applications are bulk materials; however, miniaturizing them to the nanoscale (nanoMOFs) and integrating the resulting nanoMOFs onto surfaces will be essential for the future development of MOF-based materials and devices. Analogously to the well-known case of inorganic nanoparticles, nanoMOFs can exhibit novel and often enhanced properties compared to their corresponding bulk form, opening up new perspectives for many technological and biomedical applications. In this chapter, we summarize recent advances in nanoMOF synthesis (0D, 1D, 2D nanoMOFs, SURMOFs, hybrid MOF-based nanocomposites, and MOF superstructures) and describe how their small size can optimize their potential in gas storage and separation, drug delivery, medical imaging, catalysis, magnetism, and sensors, offering a panoramic view of this embryonic class of nanomaterials.
Keywords:
metal-organic frameworks;
nanoMOFs;
synthesis;
nanochemistry;
SURMOFs;
hybrid MOF nanocomposites;
MOF superstructures;
gas storage and separation;
drug delivery;
contrast agents;
magnetism;
sensing
2 citations
TL;DR: In this article, the authors developed synthetic strategies to control the one-, two-and three-dimensional organization of MOF crystals, and used them to control one-dimensional MOF structures.
Abstract: Review: [recently developed synthetic strategies to control the one-, two- and three-dimensional organisation of MOF crystals; 53 refs.
2 citations